JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <select class="classeDoPrimeiroSelect">
            <option value="0"><table><tr><td>coluna 1</td><td>coluna 2</td></tr></table></option>
            <option value="1">1</option>
            <option value="2">2</option>
        </select>
    </tr>
    <tr>
        <td class="a">Bola</td>
        <td class="b"><c:if test="${fn:endsWith(filename, ".txt")}"></td>
    </tr>
</table>

JavaScript

var tdA = $('td.a').html();
var tdB = $('td.b').html();

$('td.a').html(tdB);
$('td.b').html(tdA);